Temporary fixing tnlTriangleArea, fixing getElementMeasure.

src/core/vectors/tnlStaticVector.h

@@ -453,4 +453,20 @@ Real tnlTriangleArea( const tnlStaticVector< 2, Real >& a,
    return 0.5 * sqrt( tnlScalarProduct( v, v ) );
 };
 
+template< typename Real >
+Real tnlTriangleArea( const tnlStaticVector< 3, Real >& a,
+                      const tnlStaticVector< 3, Real >& b,
+                      const tnlStaticVector< 3, Real >& c )
+{
+   tnlStaticVector< 3, Real > u1, u2;
+   u1. x() = b. x() - a. x();
+   u1. y() = b. y() - a. y();
+   u1. z() = 0.0;
+   u2. x() = c. x() - a. x();
+   u2. y() = c. y() - a. y();
+   u2. z() = 0;
+
+   const tnlStaticVector< 3, Real > v = tnlVectorProduct( u1, u2 );
+   return 0.5 * sqrt( tnlScalarProduct( v, v ) );
+};
 #endif /* TNLSTATICVECTOR_H_ */

src/implementation/mesh/tnlIdenticalGridGeometry_impl.h

@@ -327,7 +327,7 @@ template< typename Real,
 void tnlIdenticalGridGeometry< 3, Real, Device, Index > :: setParametricStep( const VertexType& parametricStep )
 {
    this -> parametricStep = parametricStep;
-   this -> elementMeasure = this -> parametricStep. x() * this -> parametricStep. y();
+   this -> elementMeasure = this -> parametricStep. x() * this -> parametricStep. y()* this -> parametricStep. z();
 }
 
 template< typename Real,